Add the option to disable IPv6 ICE candidates on WiFi

webrtc/p2p/base/portallocator.h

 /*
  *  Copyright 2004 The WebRTC Project Authors. All rights reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 55 matching lines @@
 
   // When multiple networks exist, do not gather candidates on the ones with
   // high cost. So if both Wi-Fi and cellular networks exist, gather only on the
   // Wi-Fi network. If a network type is "unknown", it has a cost lower than
   // cellular but higher than Wi-Fi/Ethernet. So if an unknown network exists,
   // cellular networks will not be used to gather candidates and if a Wi-Fi
   // network is present, "unknown" networks will not be usd to gather
   // candidates. Doing so ensures that even if a cellular network type was not
   // detected initially, it would not be used if a Wi-Fi network is present.
   PORTALLOCATOR_DISABLE_COSTLY_NETWORKS = 0x2000,
+
+  // When specified, do not collect IPv6 ICE candidates on Wi-Fi.
+  PORTALLOCATOR_ENABLE_IPV6_ON_WIFI = 0x4000,
 };
 
 // Defines various reasons that have caused ICE regathering.
 enum class IceRegatheringReason { NETWORK_CHANGE, NETWORK_FAILURE, MAX_VALUE };
 
 const uint32_t kDefaultPortAllocatorFlags = 0;
 
 const uint32_t kDefaultStepDelay = 1000;  // 1 sec step delay.
 // As per RFC 5245 Appendix B.1, STUN transactions need to be paced at certain
 // internal. Less than 20ms is not acceptable. We choose 50ms as our default.
@@ skipping 344 matching lines @@
   int candidate_pool_size_ = 0;  // Last value passed into SetConfiguration.
   std::deque<std::unique_ptr<PortAllocatorSession>> pooled_sessions_;
   bool prune_turn_ports_ = false;
 
   webrtc::MetricsObserverInterface* metrics_observer_ = nullptr;
 };
 
 }  // namespace cricket
 
 #endif  // WEBRTC_P2P_BASE_PORTALLOCATOR_H_